Aspartate-functional polyhydantoin prepolymers and their use in coating compositions
US5597930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1995 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | May 18, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0616
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to aspartate-functional hydantoin prepolymers prepared by reacting a polyisocyanate having a functionality of at least 1.8 with a polyaspartate corresponding to the formula ##STR1## wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100.degree. C. or less, and PA0 R.sub.1 and R.sub.2 may be the same or different and represent optionally substituted hydrocarbon radicals, PA0 R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less and PA0 n has a value of 2 to 6, preferably 2 to 4 and more preferably 2. The present invention is also directed to compositions suitable for the production of coatings, adhesives, elastomers, potting compounds or composite matrices containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.